Beige kiln



2 s eets-sum 1. W. M. GREEN.

' BRICK KILN.

(N0 Moriel.)

No. 301,587. Patented July 8, 188

5 V V R (No Model.) 2 Sheets-Sheet 2.

W. M. GREEN.

. BRICK KILN. No. 301587. 'Patehted July 8, 1884.-

JQE

tion in the kilns of usual form and arrange- UNITEED STATES ATENT rarest WILLIAM M. GREEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE- EXHAUST VENTILATOR COMPANY, OF SAME PLACE.

KILN.

SPECIFICATION forming part of Letters Patent No. 301,587, dated July 8, 188%.

Application filed April 22, 1884. No model.)

To all whom it may concern:

Be it known that I, NM. M. GREEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful In1- provements in, Brick-Kilns, of which the following is a specification.

My invention is a kiln in which to dry brick, tiles, or other articles of earthenware or pottery, constructed as fully described hereinafter, so as to insure a more positive action of the gases or products of combustion than results in the ordinarystructures.

In the drawings, Figure l is a sectional elevation of a kiln illustrating my invention.- Fig. 2 is a sectional elevation of another form of. kiln; Fig. 3, an end View of the kiln shown in Fig. 2; Figs. 4, 5, and 6, sectional elevations on the lines A B C, respectively, Fig. 2.

In the ordinary process of drying brick, tiles, and other objects of like material, it is common to placethe articles in proper posiment, and provided with usual inlets and outlets, and there subject them to the action of heat, or to eurrentsof air as differently applied. A great objection to this mode of operation lies in the fact that the currents of heated air or gases moved only by natural impulse (or natural causes) unequally alfectsthe contents of the drying-chamber or kiln.

It is the object of my invention to secureas nearly aspossible a wide spread and uniform disposition of the heated currents as they onter the kiln or drying-chamber, and to conduct them at uniform rates of speed over and between all the articles or parts to be dried, the quantity of heat and the volume and velocity of the heated air or gases being subject to reasonably perfect control. This result I obtain, first, by conducting the gases or heated air through openings suitably arranged; second, in rarefying and exhausting the air at one portion of the kiln or drying-chamber, and thus inducing an even and uniform flow of the gases or heated air toward this point.

- 'Io effect the first result-to wit, the distributibn of the gases or heated currents upon. entering the kiln or drying-chamber-I may either, first, form a trough, XV, along the bottom of the kiln, communicating at the rear end with the fire-place E, arched over from the fire-place to the point A, then communicating with the tube F, arranged in the trough aiid terminating at the point B. Perforations an 53 in the arch and tube permit the gases to How upward at different points, so as to be widely and uniformly distributed. This or modifica tions of the same may be used when the gases of combustion are communicated directly to the kiln or drying-chamber. Or, second, the continuation of pipe to the front end of the kiln or drying-chamber with suitable inlets for air to be brought in intimate contact with the pipe F, which may be done by a second and larger tube or channel, WV, inclosing the pipe F, and opening at the rear end into the air, and provided, during its passage, with suitable openings for the emission of heated air; or, third, steam-pipe arranged in stacks or coils and located at points whence outer air is admitted, care being taken to force the incoming air between the pipes by suitably inclosing the'steanrpipcs by the usual wellknown devices.

To rarefy the air, I employ one or more exhaust-fans, each adapted to an opening, Y, in one of the walls of the kiln or drying-chamber, and with such free and unobstructed communication, as at v, between the back or exhaust side of the fan and the interior space of the kiln or drying-chamber that the current created by the fan will not be drawn to any one point-as to the side or top-but will flow evenly through and from the-whole body of the kiln or drying-chamber.

The exhausting action of the fan is most important, for a slight rarefication at one end of the kiln will insure an instant and even flow of the gases throughout the whole chamber, 0

while a blowing action from the front end of the kiln would result in compressing and compacting the air, depending upon the extent and capacityof the outlet, while the currents would flow to one side or the other, accord 5 ing to the position of the outlet.

When a stack is used as a means of creating a draft, the intensity of the latter depends upon the heat of the gases and the condition of the atmosphere, and consequently varies frequent- 10o 1y during the operation of drying. By the use of an exhaustfan I am enabled to so regulate the currents that all such irregular action is avoided, either in drying the bricks or in burning them.

To avoid the necessity of making the kiln of such size as to hold the entire mass to be operated on, I use a kilnwith doors J at the ends and rails to receive traveling trucks I, as is common in other continuous kilns.

To prevent theinterference of outer currents of air with the free discharge of the gases, when fans are placed in front end, as in Fig. 2, I, place shields V opposite or around the openings Y, but at such a distance as to permit the unobstructed outward flow. The kiln may be provided with the usual stack. 0, as an auxiliary, and witha damper, H, for closing it. WVhere the gases are surcharged with vapors and are heavy, I make a lower outlet or channel, w, and place an exhaust-fan, E, therein, which draws out the gases at the bottom of the kiln.

' In Figs. 2 and 3 the fans are shown as arranged vertically with vertical shields to prevent the inflow of air; but a preferable construction is that shown in Fig. 1, where the fan is arranged horizontally, preferably above the enlarged portion of chamber near the front of the kiln and protected by an annular shield, V, the fan thus coacting with the natural tendency of the heated air to flow upward, so that a better exhausting effect is secured with less power than when the fan is vertical.

1. The combination, in a kiln or dryingehamber, of a furnace at one end with openings communicating with the kiln at one or more points, and one or more exhaust-fans arranged in an opening at the opposite end of the kiln, with a free communication between the opening leading to the fan and the top of the kiln-chamber, substantially as set forth.

2. The combination, with a kiln or dryingchamber, of a furnace arranged at one end and communicating with the kiln at one or more points, and one or more exhaust fans arranged in an opening at the opposite end of the kiln, with a free communication between the said opening and the top of the kiln-chamber, substantially as set forth.

3. The combination, in a kiln or dryingat the front end, and trough W, covered for a part of its length with a perforated arch and containing a perforated tube for another part of its length, substantially as specified.

6. The combination of a kiln or dryingchamber, the exhaust-fan at one end, furnace at the other, and trough WV, covered for its entire length with a perforated arch, and containing a perforated tube communicating at one end with openings into the outside air and containing a smoke and gas fiue connected with the furnace.

7. The combination, in a kiln or dryingchamber, of a drying-chamber communicatmg with a gas-inlet and with one or more outlets above the kiln-chamber, exhaust-fans arranged in or adjacent to said outlets, and a dischargeflue communicating with the lower part of the chamber and containing an exhaust-fan, substantially as described.

WILLIAM M. GREEN.

\Vitnesses:

WALTER BURNHAM, BERTINE BONNELL. 

